Locate Corrupted Task in Windows Task Scheduler

When I try to perform some operations in Windows Task Scheduler I get a generic "Task Scheduler service is not available. Verify that the service is running." or "The task image is corrupt or has been tampered with."

This is a Windows 7 system that was never upgraded to Windows 10. The Scheduler is running. There are dozens of tasks running. I believe the problem is that one or more of the tasks is corrupted.

Is there someway to determine which tasks are corrupted? I looked through all the statuses and there was nothing that said 'Corrupted'.

I don't want to have to drop and restart all the tasks if I don't have to.